Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 29, 2019
Document And Entity Information
Entity Registrant Name	CAPSTONE COMPANIES, INC.
Entity Central Index Key	0000814926
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity's Reporting Status Current?	Yes
Is Entity Emerging Growth Company?	false
Elected Not To Use the Extended Transition Period	true
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Common Stock, Shares Outstanding		46,946,364
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019